Hello, the check engine light just recently came on in my 06 grand cherokee. I read up on how to retrieve the code and such, however i did the proper key cycle a mess of times and i can't get the codes to display. If someone could chime in that would be great thanks!

Well, I went out and tried get the code again and still wont show it. So I road down to the auto parts store had the put the code reader on it and it wont read either. The scanner kept coming up error unable to communicate with vehicle. So something cant be right somewhere.

reset the pcm by disconnecting the negative terminal on the battery.....then stepping on the brtake pedal for 20-30 seconds. It will clear all codes....then when/if it comes again...then have it scanned right away.

reset the pcm by disconnecting the negative terminal on the battery.....then stepping on the brtake pedal for 20-30 seconds. It will clear all codes....then when/if it comes again...then have it scanned right away.

Hit the brake pedal while the negative cable is off or after i put it back on?